Half of my beeminder goals are binary, in the sense that the data I'm tracking is a yes/no answer to the question "did I do the thing [leave the house, do laundry, etc] today?" Thus the only datapoint I ever add is "1", to indicate I did, in fact, do the thing. Now that autofill is dead (long live autofill), I have to click the "+" and submit every time I want to mark the thing as done, which doesn't sound like much, but I have hand problems, so I try to avoid mouse movements as much as possible.
Does anyone else have goals of this format? If it's a reasonably common goal type, it might be worth considering adding a "checkmark" goal type to the current list of goal types, where hitting "Add Progress" would always just add one to the graph.